comments on these Spark Plugs

[The 'ER]

I have NGK and a bunch of guys at work run them. I would use nothing else.

 

[Bennie]

I have had nothing but good results with AC Delco, NGK and Denso. I have had bad results with Bosch and E3's. It could have just been the application but I had a 3-5mpg drop when I tried the E3 plugs in my '98 4 speed and '99 3 speed Chevy Prizms. I returned them to E3 for a full refund after about 1500 miles of data on each car. Wish they had been better.

 

[pmexpert]

Have NGK iridium ix installed. Works fine. Don't think Bosch makes something really different, so you can try that ones easily. To see real different results you will need to change also coils and wires. Otherwise all sparks will work the same